/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [https://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
package org.neo4j.cypher.internal.runtime.interpreted.pipes

import org.neo4j.cypher.internal.runtime.ClosingIterator
import org.neo4j.cypher.internal.runtime.CypherRow
import org.neo4j.cypher.internal.runtime.PrimitiveLongHelper
import org.neo4j.cypher.internal.util.attribution.Id
import org.neo4j.values.virtual.VirtualValues

case class DirectedRelationshipByIdSeekPipe(ident: String, relIdExpr: SeekArgs, toNode: String, fromNode: String)(
  val id: Id = Id.INVALID_ID
) extends Pipe {

  protected def internalCreateResults(state: QueryState): ClosingIterator[CypherRow] = {
    val ctx = state.newRowWithArgument(rowFactory)
    val relIds = relIdExpr.expressions(ctx, state)
    val relationships = new DirectedRelationshipIdSeekIterator(
      relIds.iterator(),
      state.query.transactionalContext.dataRead,
      state.query.scanCursor()
    )
    PrimitiveLongHelper.map(
      relationships,
      r => {
        rowFactory.copyWith(
          ctx,
          ident,
          VirtualValues.relationship(r, relationships.startNodeId(), relationships.endNodeId(), relationships.typeId()),
          fromNode,
          VirtualValues.node(relationships.startNodeId()),
          toNode,
          VirtualValues.node(relationships.endNodeId())
        )
      }
    )
  }
}
